My husband and I tried to conceive for almost two years before we were pregnant. I had a LOT of tests done. (bloodwork on days 3 and 21 of my cycle, an ultrasound to look at my reproductive organs & a VERY PAINFUL HSG test to see if my tubes were open) They also tested my husband's semen. After all of the tests, my OB informed me that there was NOTHING wrong with either of us. He called it "unexplained infertility" and put us on clomid. Two months later we were pregnant with Aubrielle!